Valve-truing machine



Gct. 15, 1929. KEHDER 1,731,535

' VALVE TRUING MACHINE Filed April 7. 1927 2 Sheets-Sheet 1 Oct. 15,1929. H. E. KEHDER 1,731,535

' VALVE TRUING MACHINE Filed April 7', 192'? 2 Sheets-Sheet 2 PatentedOct. 15, 1929 UNITED STATES HENRY E. KEI-IDER,

or HUEY, ILLINOIS VALVE -'IRUINGI MACHINE Application filed April 7,

' chine which is especially adapted for use in truing internalcombustion engine valves and for other similar uses.

A special object of the invention is to provide an improved machine ofthis kind which is compact, simple in construction, strong and durable,and which may be very readily operated either manually or by power.

Another object is to provide a machine of this kind including a bearingfor a valve stem, which bearing may be readily opened to permit theready mounting or removal of a valve stem.

Another object is to provide means for adjusting or moving the valveduring the grinding operation.

With the above and other objects in view, the invention consists in theconstruction, combination and arrangement of devices hereinafterdescribed and claimed.

In the accompanying drawings Figure 1 is a plan of a valve grindingmachine constructed and arranged in accordance with my invention andshowing the same in connection with an internal combustion engine valvearranged to be ground by the machine.

Figure 2 is a vertical transverse sectional View of the same on theplanes indicated by the line 22 of Figure 1.

Figure 3 is a front elevation of the same.

Figure 1 is a detail vertical sectional view on the plane indicated bythe line 4C4= of Figure 3.

Figure 5 is a detail end elevation, showing the driving gears.

In the embodiment of my invention I provide a bed or base 1 from whichrises a standard or pillar 2 which is integral therewith and which isprovided with a bearing 3 for a shaft 4. I also provide a pillar 5 whichis detachably secured to the front side of the pillar 2 by a bolt 6 andthe lower end of which bears on the base 1. At its upperend the pillar 5is provided with a longitudinally extending arm 6 which projects fromone side 1927. :Serial No. 181,854.

thereof, said arm having an opening7 to receive and permit .-movement ofthe valve. 011 the front side of the arm 6, at its upper portion, .is agrinding blade 8 which is secureddetachably in place by, means of bolts9 and which is arranged inan inclined position as shown and is providedat its lower side with a beveled cutting edge 10. A bear-- in-gjaw 11 isarranged. on the front side of the upper portion of the pillar 5 and ishingedly connected thereto at its lower side, said bearingj aw havinglugs 12 which extend downwardly therefrom, said pillar having forwardlyextending lugs 13 against the opposing sides of whichthe lugs 12 bear,and a pintle. rod 14 being arranged in corresponding openings with whichsaid lugs 12, 13 are provided and said pintle rod coacting with saidlugs to thus hingedly connectithe bearing jaw=to the pillar 5 so thatsaid bearing jaw may be closed against the pillar as shown inthedrawingsor may be opened therefrom and swung downwardly from the pintle rod 1 1as-willbeunderstood.

The pillar 5 and bearing jaw 11 are respectivelyprovided invtheiropposing sides with semi-cylindrical bearing bores 5 11 to receive thestem rod orshaft 15 of the valve 16 which is to be ground and to permitthe rotation thereof and its detachment fromthe machine when desired.

, To secure the bearing jaw 11 in closed position and permit of itsready release, I provide said jaw with a vertical notch 17 in its upperedge and the pillar 5 with a corresponds5 ing notch 18. A'fasteningscrew 19 has one end pivotally mounted in the notch 18 by a pin 20 whichextends through said notch and saidscrew is adapted to be turnedforwardly into and to extend through and project from the front side ofthe notch 17 andis provided With a winged nut 21 which is threadedthereon and which may be caused to bear firmly against the front side ofthe upper portion of thebearing'ja'w "11 to securely and yet de-VQ5tachably lock the latter in the closed position shown in the drawingsand thus keep the stem or shaft of the valve securely and yet detachablymounted in its bearing.

A screw 22 is threaded in an opening on the outer end of the arm 6,enters the opening 7 of said arm and is concentric with the valve stemor shaft and hence is adapted to bear against the center of the valve asshown. This screw is provided with a head 23 by which it may be readilyturned manually to move the valve slightly endWise from time to time asmay be required while grinding the valve.

Any suitable means may within the scope of my invention be provided forturning the valve stem or shaft, together with the valve, to cause thelatter to be cut and ground by the edge of the blade 8. For this purposeI here show a long pinion 2% on one end of the shaft 4 and a powerpulley 25 on the other end of said shaft and I also show a gear Wheel 26which is detachably and slidably engaged with the long pinion and whichhas a hub 27 through which the valve stem 15 extends,

vsaid hub being provided with a set screw 28 to engage the valve stemand to thereby detachably secure said gear wheel on said valve stem.

It is thought the operation of the invention will be entirely understoodfrom the foregoing description and that it will be also understood thata number of valves may be readily and rapidly successively ground by theuse of the machine, as each valve when its grinding is finished can bereadily released by opening the bearing member 11, whereupon the gearwheel 26 can be detached from said valve stem and secured on the stem ofanother valve, which last named, valve stem can be then mounted in thebearing 5, 11, the bearing member 11 fastened and the valve on said stemground in the manner and by the means hereinafter described.

Having thus described my invention, I claim A valve truing machinecomprising a base having a standard provided with a bearing, a

shaft mounted in said bearing and having a pinion; a pillar detachablysecured to one side of said standard and provided with a longitudinallyextending arm projecting from one side, said arm having an opening toreceive and permit movement of a valve, a bearing member detachablyconnected to said pillar, said member and said pillar having a hearingbore in their opposing faces to receive a valve stem, a truing elementsecured on said arm of the pillar and arranged to engage the valve to betrued, means to adjust the valve and its stem endwise during thegrinding of the valve and a gear for attachment to the valve stem and inengagement with said pin- 1011. 7

In witness whereof I affix my signature.

HENRY E. KEHDER.

